18468651817 has 8 divisors (see below), whose sum is σ = 23025851712. Its totient is φ = 14391157200.

The previous prime is 18468651793. The next prime is 18468651889. The reversal of 18468651817 is 71815686481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18468651817 - 2⁷ = 18468651689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18468651217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119926234 + ... + 119926387.

It is an arithmetic number, because the mean of its divisors is an integer number (2878231464).

Almost surely, 2^18468651817 is an apocalyptic number.

It is an amenable number.

18468651817 is a deficient number, since it is larger than the sum of its proper divisors (4557199895).

18468651817 is a wasteful number, since it uses less digits than its factorization.

18468651817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239852639.

The product of its digits is 2580480, while the sum is 55.

The spelling of 18468651817 in words is "eighteen billion, four hundred sixty-eight million, six hundred fifty-one thousand, eight hundred seventeen".